Tionesta Lake, PA

As of 2026-10-13, Tionesta Lake sits at 1089.78 ft, which is about average for this time of year. That is 5.21 ft above full pool of 1084.57 ft. It is still 79.8 ft below the flood pool of 1169.57 ft. Over the past 30 days the level has fallen 10.12 ft.

The most recent reading at Tionesta Lake is 1089.78 ft (2026-10-13), sourced from the U.S. Army Corps of Engineers. Readings on this page refresh automatically as the agency publishes new data.

The highest level for Tionesta Lake in our records is 1137.06 ft on 2024-04-15. The lowest is 1084.81 ft on 2019-02-26. Our record covers about 12 years of readings.

Compared with every October in our records, the current level is higher than 46% of them, which we classify as about average for this time of year. Seasonal comparison matters more than the raw number, because most reservoirs draw down predictably through late summer and refill over winter and spring.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Tionesta Lake has fallen 10.12 ft over the past 30 days. For the operational reason on any given week, check the U.S. Army Corps of Engineers directly.

Tionesta Lake is -0.49 ft compared with this date last year (1089.78 ft today). The full-history chart above covers 12 years, with a record high of 1137.06 ft and a record low of 1084.81 ft.